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main.go
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main.go
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package main
import (
"context"
"log"
"time"
"github.com/ThreeDotsLabs/watermill"
"github.com/ThreeDotsLabs/watermill-sql/v3/pkg/sql"
"github.com/ThreeDotsLabs/watermill/message"
"github.com/davidroman0O/comfylite3"
comfymill "github.com/davidroman0O/watermill-comfymill"
)
func main() {
db, err := comfymill.NewDatabase(
comfylite3.WithMemory(),
)
if err != nil {
panic(err)
}
logger := watermill.NewStdLogger(false, false)
subscriber, err := sql.NewSubscriber(
db,
sql.SubscriberConfig{
SchemaAdapter: comfymill.DefaultSQLite3Schema{},
OffsetsAdapter: comfymill.DefaultSQLite3OffsetsAdapter{},
InitializeSchema: true,
},
logger,
)
if err != nil {
panic(err)
}
messages, err := subscriber.Subscribe(context.Background(), "example_topic")
if err != nil {
panic(err)
}
go process(messages)
publisher, err := sql.NewPublisher(
db,
sql.PublisherConfig{
SchemaAdapter: comfymill.DefaultSQLite3Schema{},
},
logger,
)
if err != nil {
panic(err)
}
publishMessages(publisher)
}
func publishMessages(publisher message.Publisher) {
for {
msg := message.NewMessage(watermill.NewUUID(), []byte(`{"message": "Hello, world!"}`))
if err := publisher.Publish("example_topic", msg); err != nil {
panic(err)
}
time.Sleep(time.Second)
}
}
func process(messages <-chan *message.Message) {
for msg := range messages {
log.Printf("received message: %s, payload: %s", msg.UUID, string(msg.Payload))
// we need to Acknowledge that we received and processed the message,
// otherwise, it will be resent over and over again.
msg.Ack()
}
}